Upper limits on the shortest AGN variability timescales are log(t_min,ul/hrs) = 0.85 ± 0.55, interpreted as light-crossing times from a few to thousands of gravitational radii in regions smaller than accretion disks.
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The shortest detected intra-day variability of active galactic nuclei in TESS survey
Upper limits on the shortest AGN variability timescales are log(t_min,ul/hrs) = 0.85 ± 0.55, interpreted as light-crossing times from a few to thousands of gravitational radii in regions smaller than accretion disks.